Apparatus and methods for burning waste, and waste slurries
First Claim
1. A burner for burning waste, comprising:
- a conventional fuel nozzle and a waste slurry nozzle, said waste slurry nozzle comprising a first conduit for conveying a waste slurry, a single second conduit for conveying a fluid stream, and an acceleration zone, said acceleration zone comprising a mixing chamber and an acceleration conduit, said first conduit having an inlet and an outlet, said second conduit having an entrance and an exit, said mixing chamber having an intake end and a release end, said acceleration conduit having a receiving end and a discharge end, said intake end of said mixing chamber communicating with said outlet of said first conduit and said exit of said second conduit, said release end of said mixing chamber communicating with said receiving end of said acceleration conduit, said mixing chamber tapering down from said intake end to said release end and said first conduit outlet and second conduit exit being arranged relative to said mixing chamber intake end such that said waste slurry and fluid streams are mixed in said mixing chamber into a single combined stream.
1 Assignment
0 Petitions
Accused Products
Abstract
Burners for burning waste, comprising a conventional fuel nozzle and a waste slurry nozzle. Waste slurry nozzles, comprising a first conduit, a second conduit and an acceleration zone comprising a mixing chamber and an acceleration conduit. Waste slurries comprising a continuous phase and a solids phase, the solids phase consisting essentially of solids having at least one dimension less than about 1/8 inch and solids having no dimension less than 1/8 inch and no dimension larger than about 5/8 inch. Methods for burning waste, comprising feeding a slurry of cement raw materials to an up end of a rotating kiln, and ejecting a waste slurry from a burner such that a portion of the waste slurry lands in the calcining zone of the kiln.
51 Citations
49 Claims
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1. A burner for burning waste, comprising:
a conventional fuel nozzle and a waste slurry nozzle, said waste slurry nozzle comprising a first conduit for conveying a waste slurry, a single second conduit for conveying a fluid stream, and an acceleration zone, said acceleration zone comprising a mixing chamber and an acceleration conduit, said first conduit having an inlet and an outlet, said second conduit having an entrance and an exit, said mixing chamber having an intake end and a release end, said acceleration conduit having a receiving end and a discharge end, said intake end of said mixing chamber communicating with said outlet of said first conduit and said exit of said second conduit, said release end of said mixing chamber communicating with said receiving end of said acceleration conduit, said mixing chamber tapering down from said intake end to said release end and said first conduit outlet and second conduit exit being arranged relative to said mixing chamber intake end such that said waste slurry and fluid streams are mixed in said mixing chamber into a single combined stream. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A burner for burning waste, comprising a kiln operating at less than atmospheric pressure, said kiln having an up end and a down end, said burner being positioned in said down end of said kiln, the burner comprising:
a conventional fuel nozzle and a waste slurry nozzle, said waste slurry nozzle comprising a first conduit, a second conduit, and an acceleration zone, said acceleration zone comprising a mixing chamber and an acceleration conduit, said first conduit having an inlet and an outlet, said first conduit having a substantially linear axis, said second conduit having an entrance and an exit, said second conduit having a substantially linear axis, said mixing chamber having an intake end and a release end, said acceleration conduit having a receiving end and a discharge end, said acceleration conduit having a substantially linear axis, said intake end of said mixing chamber communicating with said outlet of said first conduit and said exit of said second conduit, said release end of said mixing chamber communicating with said receiving end of said acceleration conduit, said axis of said first conduit and said axis of said acceleration conduit being substantially coaxial, said axis of said second conduit and said axis of said first conduit being substantially parallel.
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8. A burner for burning waste, comprising:
a conventional fuel nozzle comprising a first conduit, a second conduit, and an acceleration zone, said acceleration zone comprising a mixing chamber and an acceleration conduit, said first conduit having an inlet and an outlet, said first conduit having an interior diameter in the range of from about 1.0 to about 2.5 inches, said first conduit being positioned inside said second conduit, said second conduit having an entrance and an exit, said second conduit having an interior diameter in the range of from about 3.0 to about 5.0 inches, said mixing chamber having an intake end and a release end, said acceleration conduit having a receiving end and a discharge end, said acceleration conduit having an interior diameter in the range of from about 1.0 to about 2.5 inches, said intake end of said mixing chamber communicating with said outlet of said first conduit and said exit of said second conduit, said release end of said mixing chamber communicating with said receiving end of said acceleration conduit. - View Dependent Claims (9, 10)
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11. A waste slurry nozzle, comprising:
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a first conduit having an inlet and an outlet, a second conduit having an entrance and an exit, and an acceleration zone comprising a mixing chamber and an acceleration conduit, said mixing chamber having an intake end and a release end, said acceleration conduit having a receiving end and a discharge end; said intake end of said mixing chamber communicating with said outlet of said first conduit and said exit of said second conduit, said release end of said mixing chamber communicating with said receiving end of said acceleration conduit; said acceleration zone being of a length in the range of from about 10 to about 30 times an interior diameter of said acceleration conduit. - View Dependent Claims (12, 13, 14)
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- 15. A waste slurry comprising a continuous phase and a solids phase, said solids phase consisting essentially of waste solids having at least one dimension less than about 1/8 inch and waste solids having no dimension less than about 1/8 inch and no dimension larger than about 5/8 inch.
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23. A method for burning waste, comprising:
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feeding a slurry of cement raw materials to an up end of a rotating kiln having said up end and a down end, a calcining zone between said up end and said down end and a clinkering zone between said calcining zone and said down end; and ejecting a waste slurry from a burner at said down end in said clinkering zone such that a portion of said waste slurry burns in a flame emanating from said burner and the remainder of said waste slurry lands in said calcining zone. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A method for burning waste, comprising:
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feeding a slurry of cement raw materials to an up end of a rotating kiln having said up end and a down end, a calcining zone between said up end and said down end and a clinkering zone between said calcining zone and said down end; and ejecting a waste slurry at said down end into said clinkering zone, said waste slurry comprising a continuous phase and a solids phase, said solids phase consisting essentially of waste solids having at least one dimension less than about 1/8 inch and waste solids having no dimension less than about 1/8 inch and no dimension larger than about 5/8 inch. - View Dependent Claims (38, 39)
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40. A method for burning waste, comprising:
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feeding a slurry of cement raw materials to an up end of a rotating kiln having said up end and a down end, a calcining zone between said up end and said down end and a clinkering zone between said calcining zone and said down end; and ejecting a waste slurry at said down end in said clinkering zone, said waste slurry comprising a continuous phase and a solids phase, said solids phase comprising solids having at least one dimension less than about 1/8 inch and solids having no dimension less than about 1/8 inch and no dimension larger than about 5/8 inch.
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41. A method for burning waste, comprising:
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feeding a slurry of cement raw materials to an up end of a rotating kiln having said up end and a down end, a calcining zone between said up end and said down end and a clinkering zone between said calcining zone and said down end; and ejecting a waste slurry at said down end in said clinkering zone, said waste slurry comprising a continuous phase and a solids phase, said continuous phase comprising air, said air comprising from about 50 to about 225 weight percent, based on the amount of said solids phase.
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42. A waste slurry nozzle, comprising:
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a first conduit for feeding a waste slurry containing solids having at least one dimension less than about 1/8 inch and solids having no dimension less than about 1/8 inch and no dimension larger than about 5/8 inch, said first conduit having an inlet and an outlet, a second conduit for feeding air from a pressure source at a pressure of from about 35 to 95 psi, said second conduit having an entrance and an exit, and an acceleration zone comprising a mixing chamber and an acceleration conduit, said mixing chamber having an intake end and a release end, said acceleration conduit having a receiving end and a discharge end; said intake end of said mixing chamber communicating with said outlet of said first conduit and said exit of said second conduit, said release end of said mixing chamber communicating with said receiving end of said acceleration conduit; said mixing chamber and said acceleration conduit being shaped such that said waste fed from said first conduit is accelerated by said air fed from said second conduit to a velocity of at least 75% of the velocity at which the air exits from the second conduit.
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43. Waste burning apparatus including a burner cooperating with a combustion chamber operated at less than atmospheric pressure, said burner comprising:
a conventional fuel nozzle and a waste slurry nozzle, said waste slurry nozzle comprising a first conduit, a second conduit, and an acceleration zone, said acceleration zone comprising a mixing chamber and an acceleration conduit, said first conduit having an inlet and an outlet, said second conduit having an entrance and an exit, said mixing chamber having an intake end and a release end, said acceleration conduit having a receiving end and a discharge end, said intake end of said mixing chamber communicating with said outlet of said first conduit and said exit of said second conduit, said release end of said mixing chamber communicating with said receiving end of said acceleration conduit, said mixing chamber tapering down from said intake end to said release end.
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44. A waste slurry nozzle for a burner for burning waste, said waste slurry nozzle comprising:
a first conduit, a second conduit, and an acceleration zone, said acceleration zone comprising a mixing chamber and an acceleration conduit, said first conduit having an inlet and an outlet, said second conduit having an entrance and an exit, said first conduit and said second conduit having parallel longitudinal axes, said first conduit outlet being non-concentrically disposed with respect to the second conduit exit, said mixing chamber having an intake end and a release end, said acceleration conduit having a receiving end and a discharge end, said intake end of said mixing chamber communicating with said outlet of said first conduit and said exit of said second conduit, said release end of said mixing chamber communicating with said receiving end of said acceleration conduit, said mixing chamber tapering down from said intake end to said release end. - View Dependent Claims (48)
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45. A waste slurry nozzle for a burner for burning waste, comprising:
a first conduit, a second conduit, and an acceleration zone, said first conduit, but not said second conduit, being coaxially disposed relative to said acceleration conduit, said acceleration zone comprising a mixing chamber and an acceleration conduit, said first conduit having an inlet and an outlet, said second conduit having an entrance and an exit, said first conduit and said second conduit having parallel longitudinal axes, said mixing chamber having an intake end and a release end, said acceleration conduit having a receiving end and a discharge end, said intake end of said mixing chamber communicating with said outlet of said first conduit and said exit of said second conduit, said release end of said mixing chamber communicating with said receiving end of said acceleration conduit, said mixing chamber tapering down from said intake end to said release end. - View Dependent Claims (49)
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46. A waste slurry nozzle for a burner for burning waste, comprising:
a first conduit, a second conduit, and an acceleration zone, said acceleration zone comprising a mixing chamber and an acceleration conduit, said first conduit having an inlet and an outlet, said second conduit having an entrance and an exit, said second conduit exit being on the order of twice as large as said first conduit outlet, said mixing chamber having an intake end and a release end, said acceleration conduit having a receiving end and a discharge end, said intake end of said mixing chamber communicating with said outlet of said first conduit and said exit of said second conduit, said release end of said mixing chamber communicating with said receiving end of said acceleration conduit, said mixing chamber tapering down from said intake end to said release end so as to define a sloping surface, and said second conduit exit is arranged relative to said mixing chamber intake end such that a stream flowing through said second conduit is deflected by said sloping surface.
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47. A burner for burning waste, comprising:
a conventional fuel nozzle and a waste slurry nozzle, said waste slurry nozzle comprising a first conduit, a second conduit, and an acceleration zone, said acceleration zone comprising a mixing chamber and an acceleration conduit, said first conduit having an inlet and an outlet, said second conduit having an entrance and an exit, said mixing chamber having an intake end and a release end, said acceleration conduit having a receiving end and a discharge end, said intake end of said mixing chamber communicating with said outlet of said first conduit and said exit of said second conduit, said release end of said mixing chamber communicating with said receiving end of said acceleration conduit, said mixing chamber tapering down from said intake end to said release end, wherein the ratio of the difference between the cross sectional areas of said intake end and said release end, divided by a distance between said intake end and said release end is in the range of from about 0.5 to about 2.0.
Specification